C++读取文件

方法1：
    ifstream myfile("mydate.txt");
    string content = "";
    string line    ="";
    std_msgs::String taskData;
    if (myfile.is_open())
    {
        while(getline(myfile,line))
        {
            content +=line;
            content +="\n";
            line    ="";
         }
         myfile.close();
         cout<<content<<endl;
    }
    
 方法2：